If old newspapers are stacking up in your house, there are options other than tossing them out or selling them to a recycler. Some environmental scientists suggest turning newspapers __16__ charcoal. This can be done by soaking sheets of newspaper in water for two hours and then __17__ them into small pieces. These pieces are then compressed into balls. After the water is __18__, the ball-shaped pieces are put under the sun to dry before they can be used as a firewood or charcoal substitute. __19__ suggestion made by the experts is to dip newspaper sheets in vinegar and water, and use them to clean windows, mirrors, and tiles. Old papers can __20__ be used to line rubbish bins and as packing material when mailing breakable goods.
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